Brush-holder.



W m A w Patented luly 2, 190|.

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J J WOOD 'BRUSH HOLDER.

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(No Model.)

Cnrmm man s versus no. Pnamunp, umm. DA c.

UNiTnD STATES ATENT Prion.

JAMES J. WOOD, OF FORT WAYNE, INDIANA.

BRUSH-HOLDER..

SPECIFICATION forming part of Letters Patent No. 677,834, dated July 2, 19Q1.

Application led November 22, 1900. Serial No. 37,361. (No model.)

To @ZZ whom t may concern.'

Be it known that I, JAMES J. Woon, a citizen of the United States, residing in Fort Wayne, county of Allen and State of Indiana, have invented certain new and useful Improvements in Brush-Holders, of which the following is al specification.

My invention provides an improved brushholder which can be built cheaply and which is adapted to occupy a minimum space on the stud, so as to reduce the amount of space occupied by a given number of carbons of the same standard size.

My invention provides also an improved brush-holder having various other novel features and advantages, as hereinafter set forth.

In the accompanying drawings, illustrating an embodiment of my invention, Figure l is a side elevation of my improved holder ready for attachment to its stud, the carbon being in place. Fig. 2 isa front elevation of the holderas shown in Fig. l. Fig. 3 is a hori- Zontal section on the line 3 3, Fig. l. Fig. 4 is an under side plan view of the adjustingnut. Fig. 5 is a rear view of the upper part of the screw-bolt and the slide and nut there on; and Fig. 6 isa vertical section on the line 6 6, Fig. 5.

My improved holder is adapted to be set on a supporting-stud in the usual way, and it has, as iscommon, a socket for guiding the lower end of thefbrush, means for guiding the extension-rod which is attached to the upper end of the brush, and a spring for pressing down the end of the brush. The socket or guide which surrounds the lower end of the brush is simply and cheaply constructed, according to my invention, of a at plate forming part of its bounding-wallsuch, for example, as one entire side thereof-and of a plate of sheet metal bent to form the remaining portion of the bounding-wall, as the remaining three sides, and attached at its ends to the edges of the liat plate to form a guide for the brush. The iiat plate is preferably of cast-brass and the bent plate of sheet-brass, the former being at the back and having an extension adapted for attachment to the stud.

Attached to the brush is a rod forming an outward extension thereof. A spring surrounds this rod and bears at its lower end on the brush, its outer end being pressed downward by a slide on the rod. The slide is moved to adj ust the compression of the spring. The guides for this slide have heretofore been of a cumbersome construction, necessitating generally the making of a single holder for several brushes in order to economize space number of brushes may be put together on a machine without necessitating a frame adapted to hold this particular number of brushes and so that the brushes may be removed one at a time in case of accident. The alinement is perfectly preserved and the space on the stud occupied by the holder is a minimum, being very little more than the width of the brush itself.

An additional feature of this improved holder is a stop which holds the adjusting means so as to prevent its shaking loose under the vibration.

As shown in the drawings, A is the carbon brush, which is guided in the socket B, the socket B being attached to the stud which supports the holder by means of an eXtension C. A spring D bears against the outer end of the carbon, being guided on the eX- tension-rod E and being adj usted in compression by the slide F, which in turn guides the rod E. In the rear of the rod E is a screw-threaded rod G, on which the slide F is also guided. An adjusting-nut H screws on the rod Gr and throughthe slide F maintains the proper compression on the spring D and the carbon.

The socket B, in which the lower end of the carbon is guided, is made up (see Fig. 3) of a plain iiat plate B" at the back and of a bent sheet-metal plate B2 B3, forming the front and sides. The entire width of the socket, it will be seen, is little more than that of the carbon. A flat spring b is attached on the inside of the front B2 of the sheet metal plate and holds the carbon steady.

I am thus enabled to make my holders of a single standard size, so that any IOO The guide rod or screw G is made heavy, so as to form a stift guide Ior the slide F. This slide has an extension F' surrounding the screw and is engaged non-rotatively therewith, as by a key K, which is guided in a groove G on the screw and prevents rotary or lateral movement of the slide, which would permit the rod E to get out of alinement. The key K is preferably a separate piece soldered in a slot cut in the side of the slide F and its extension F', as shown best in Fig. 6. The nut I-I screws down on the screw-rod G to increase the pressure on the spring D when it slackens by the wearing of the carbon.

Inorder to prevent the nut II from rattling loose, I provide in its under side a groove 7L and extend the key I( up slightly above the top of the slide F, as shown at 7U', Figs. 5 and G, so that it will enter said groove by reason of the upward pressure ot' the spring D and will lock said nut against accidental rotation. The groove 71, extends entirely across the under face of the nut, so as to provide a stoppoint at each halfsrevolution.

The operation of the apparatus as a whole, as well as that of the novel features particularly referred to, is clear from the foregoing description.

. Various modifications of the apparatus shown are possible to those skilled in the art without departing from the spirit of my invention. For example, the stop for the adjusting member may be considerably modi- `tied without departing from the invention,

the embodiment used depending largely upon the construction and arrangement ofthe other parts of the holder. Any combination of a spring pressing upon the brush with an adjusting means comprising a screw and nut so arranged that the movable member is held in place by a projection and a corresponding recess formed the one in the movable member and the other in the part against which it acts, whereby the force of the spring is utilized to press said projection and recess into engagement to hold the member from turning, is within my invention.

What I claim, therefore, and desire to secure by Letters Patent are the following-deined novel features and combinations, each substantially as described:

1. In a brush-holder, a socket comprising, in combination, a flat plate at one side forming a portion ot' the bounding-Wall of said socket, and a sheet-metal plate bent to form the remaining portion of said bounding-wall and attached to said fiat plate.

2. In a brush-holder, a socket comprising, in combination, a ilat plate forming the back of said socket, and a sheet-metal plate bent to form the front and sides thereof and attached to said flat plate.

3. In a brushsholder, a socket comprising, in combination, a ilat plate B forming the back of said socket and having an extension C adapted for attachment to the supportingstud, and a sheet-metal plate bent to form the front B2 and sides of said socket and at tached to said flat plate.

4f. In a brush-holder, the combination of an extension-rod, a spring ou said exteusion-rod and pressing upon the brush, a slide on said extension-rod adapted to be moved to adjust the pressure of said spring, and a guide-rod for said slide, said slide being engaged nonrotatively with said guide-rod.

5. In a brush-holder, the combination ol' an extension-rod, a spring on said extension-rod and pressing upon the brush, a slide on said extension-rod adapted to be moved to adjust the pressure of said spring, and a guide-rod for said slide, said guide-rod having a groove Gr/ and said slide having a key I( working in said groove and preventing rotation of the slide on the guide-rod.

6. In a brush-holder, the combination ot' a socket for the brush, a spring pressing upon said brush, and means for adjusting the pressure of said spring comprising a screw and nut, the movable member of said adjusting means having means for holding it in place comprising a projection and corresponding recess formed the one in said movable member and the other in the part against which it acts, whereby the force of the spring is utilized to press said projection and recess into engagement to form a stop for said movable member.

7. In a bruslrholder, the combination of an extension-rod, a spring on said extension-rod and pressing upon the brush, and means for adjusting the pressure of said spring comprising a screw and nut, the movable member oi said adjusting means having means for holding it in place comprising a projection and corresponding recess formed the one in said movable member and the other in the part against which it acts, whereby the force ot the spring is utilized to press said projection and recess into engagement to i'orm a stop for said movable member.

8. In a brush-holder, the combination of an extension-rod, a spring on said extension-rod and pressing upon the brush, a slide on said extension-rod adapted to be moved to adjust the pressure ot'said spring, a guide-rod ior said slide, a nut on said guiderod adapted to move said slide to adjust the pressure of said spring, and a projection and corresponding recess on the adjacent faces of said slide and nut to form a stop for said nut.

9. In a brush-holder, the combination of an extension-rod, a spring on said extension-r0d and pressing upon the brush, a slide on said extension-rod adapted to be moved to adjust the pressure ot said spring, a guide-rod for said slide, a nut on said guide-rod adapted to move said slide to adj ust the pressure ol. said spring, and a projection 7a on the top of said slide engaging a groove 7L in the under side of said nut to form a stop therefor.

10. In a brush-holder, the combination of an extension-rod, a spring on said extension-rod and pressing upon the brush, a slide on said IOC IIO

extension-rod adapted to be moved to adjust In Witness whereof I have hereunto signed the pressure of said spring, a guide-rod for my name in the presence of tWo subscribing 1o said slide, said guide-rod having a groove Gr' Witnesses.

and said slide having a key K and a projec- Ition Zo above the slide, and a nut on said guide- JAMES J' WOOD rod adapted to move said slide to adjust the NVitnesses: v

pressure of said spring and having a groove EDWARD A. BARNES,

h in its under side to engage the projection 7c. ARTHUR L. HADLEY. 

